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PDC bit, also called PDC drilling bits, PDC diamond BIT 
Polycrystalline Diamond Compact or called PDC - These bits are expensive and used for very fast penetration mostly in shales. This bit has carbide or man-made industrial diamonds set in fixed blades. The cutters simply scrape the rock away during drilling, and do not rotate and grind the way the cones of a tri-cone bit do. 
GREAT PDC bits/ PDC bits 
1) Be used for water well, oil field, underground, construction, geothermal, directional boring 
2) Various of model and dimension available 
3) High quality and competitive price 
4) Improved support and retention, diamond are impregnated in the matrix behind the PDC cutters 
5) Cangzhou Great Drill Co., Ltd specializes in drill bits, tricone bits, PDC bits bit size range from 3 7/8"to 26", cover most of IADC codes. 
Cangzhou GREAT Drill Co.,ltd in China is one of the largest PDC bits factories in China. GREAT PDC BITS have some advantages as follows: 
1. Short parabolic crown profile, medium cutter density. 
2. Interchangeable screw nozzle. 
3. Structured diamond/carbide interface. Cutter delays the onset of 
Fracturing and cutter wear. 
4. Under-cut shank maximizes junk slot area for better bit cleaning. Hign filt nozzles for improved hydraulics and Rop. 
5. Can be used on rotary or down hole motor. 
6. Surfable for soft to medium formation. 

If you have interests, do not hesitate to contact me,thanks. 
Mia 
drillbits13 at zkdrilling dot com